THE STRUCTURE AND ELECTRICAL-CONDUCTIVITY OF MN-CD FERRITE

Polycrystalline samples of mixed ferrite M//n//1// minus //xCd//xFe//2O//4, where x equals 0,0. 2, 0. 4, 0. 6 and 0. 8, were studied by X-ray analysis and dc electrical conductivity. It was found that the calculated lattice parameter (a//0) increases from 0. 855 to 0. 861 nm according to increases in x from 0 to 0. 8. The apparent density and theoretical density exhibit the same behavior. It was also found that the activation energy of the conduction mechanism increases with increasing cadmium content, which affect the exchange interaction mechanism in tetrahedral sites and octahedral sites.